So, the page shows a back button to the search page. Search page is configured with:

@IonicPage({
name: "search",
segment: "search",
})

When I open the link in a new browser tab it works as expected.
But if I paste the link in the same browser tab where the app is already opened, the browser doesn’t refresh the entire page (because just the fragment is changed) and it loads the expected page. The problem is that, in this case, the back button is not shown because the nav stack is empty. Is other words the defaultHistory is not setup.